User guide

M80 EVB User Guide
M80_EVB_UGD_V1.2 - 21 -
Figure 19: Pins of SIM1 card cassette
Table 7: Pins of SIM1 card interface
Pin
Signal
I/O
Description
Note
1
GND
GND
2
VPP
Not connected
3
SIM1_DATA
I/O
SIM1 card data I/O
4
SIM1_CLK
O
SIM1 card clock
5
SIM1_RST
O
SIM1 card reset
6
SIM1_VDD
O
SIM1 power
7
Pulled down to GND with external
circuit. When the SIM card is
inserted, pin 7 is connected to pin 8.
8
SIM1_PRESENCE
I
SIM1 Card detect
In order to be compatible with further application, M80 reserves an SIM IC in the EVB. Please
refer to SIM1 card schematic about SIM IC circuit except SIM detect function, since the SIM IC
interface does not support SIM card detection. The following picture shows test points.
8
4
5
6
1
2
3
7
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